The influence of experimental conditions on the morphology and phase composition of Nb-doped ZrO2 films prepared by spark anodization

Autor(es)

Santos, J. S. ^[1] ; Trivinho-Strixino, F. ^[2] ; Pereira, E. C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, LIEC, NANOFAEL, Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Sorocaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Corrosion Science; v. 73, p. 99-105, AUG 2013.
• Citações Web of Science: 11

Resumo

This paper reports the morphological and microstructural characterization of Nb-doped ZrO2 films obtained by anodic doping in conditions of spark electrolytic breakdown. The oxide films were prepared by galvanostatic anodization of metallic Zr in oxalic acid solution containing ammonium oxaloniobate, NH4H2{[}NbO(C2O4)(3)]center dot 3H(2)O using Nb(V) ions as the precursor dopant. The characterization was performed by SEM and XRD. A factorial design was used to optimize the experiments and study the influence of experimental variables on morphology and phase composition. The results demonstrated that the dopant concentration is the most important factor that affected the analyzed responses. A significant influence of this variable was observed on the pore average diameter and on the percentage of the stabilized tetragonal phase. The temperature also affected the phase composition, however no effect was observed on the morphological response.. (C) 2013 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 07/04342-2 - Estudo da ruptura dieletrica durante a anodizacao de zirconio e o seu efeito sobre o processo de dopagem anodica de zro2 com cao
• Beneficiário: Janaina Soares Santos
• Modalidade de apoio: Bolsas no Brasil - Doutorado